slanderously (adverb)

1. She slanderously spread rumors about the popular fashion designer, ruining their reputation in the industry.

2. The art critic slanderously attacked the artist's work, claiming it lacked creativity and originality.

3. The zealot slanderously attacked the religious leader, spreading false accusations about their teachings.

4. He jokingly but slanderously announced to his friends that his favorite celebrity was actually a criminal in disguise.